/*                              GetSCSICDBLength.c                              */

/*

 * GetSCSICDBLength.c

 * Copyright © 1992-93 Apple Computer Inc. All Rights Reserved.

 */

#include    "SCSIAsyncSample.h"

/*

 * Look at the "group code" in the command operation. Return zero (error) for

 * the reserved (3, 4) and vendor-specific command (6, 7) command groups.

 * Otherwise, return the command length from the group code value as specified

 * in the SCSI-II spec.

 */

short

GetSCSICDBLength(

        const SCSI_CommandPtr   scsiCommandPtr

    )

{

        short                   result;

        switch (scsiCommandPtr->scsi[0] & 0xE0) {

        case (0 << 5):  result = 6;     break;

        case (1 << 5):

        case (2 << 5):  result = 10;    break;

        case (5 << 5):  result = 12;    break;

        default:        result = 0;     break;

        }

        return (result);

}